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Flora Sparkle Dress with 50 lights
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Flora Sparkle Dress with 50 lights

by coderunner on Fri Feb 14, 2020 7:45 pm

Hi,

I'm helping a friend make a dress for a special occasion. She wants to use around ~50 neopixels on the dress. From the product description, the Flora can power 500 neopixels, but it seems like the bigger issue would be power and the conductive thread. My questions are:

1. What kind of thread should I use? Is 50 too large an amount to use with the 3-play conductive thread? If so, would stranded core wire or copper braid work?

2. Would either of these provide enough power for 50 neopixels, the Flora board, and the Accelerometer?
https://www.adafruit.com/product/727
https://www.adafruit.com/product/1317

3. Assuming 50 neopixels just isn't doable connected to a single Flora board, I'll probably go with 5 separate installations of 10 neopixels each on the dress. Does anyone have any recommendations on making it less bulky with this route?

Thanks in advance!

coderunner
 
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Re: Flora Sparkle Dress with 50 lights

by adafruit_support_bill on Sat Feb 15, 2020 7:57 am

With that many pixels, I would recommend using silicone coated copper wire and soldered joints. https://www.adafruit.com/category/282
It is as flexible as the conductive thread, but has several advantages:
1) it is more conductive, so it can handle power for more pixels.
2) it is insulated, so you don't need to worry about short circuits from bare threads touching each other.
3) solder joints are more reliable than knotted thread.
However, I would also recommend using a drop of E6000 or silicone adhesive as a strain relief to prevent wire breakage at the joints.

2. Would either of these provide enough power for 50 neopixels, the Flora board, and the Accelerometer?

The 3xAA will have enough power. The 150mAh LiPo is too small. This would be a better choice for a LiPo: https://www.adafruit.com/product/328

3. Assuming 50 neopixels just isn't doable connected to a single Flora board, I'll probably go with 5 separate installations of 10 neopixels each on the dress. Does anyone have any recommendations on making it less bulky with this route?

That sounds like a good plan. I'd go with the 26AWG for power and ground and the 30AWG for the signal wires. Assemble and test each set of 10. Once you have them working, you can add the strain-relief before sewing to the dress.

adafruit_support_bill
 
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Joined: Sat Feb 07, 2009 10:11 am

Re: Flora Sparkle Dress with 50 lights

by coderunner on Sat Feb 15, 2020 4:54 pm

adafruit_support_bill wrote:With that many pixels, I would recommend using silicone coated copper wire and soldered joints. https://www.adafruit.com/category/282
It is as flexible as the conductive thread, but has several advantages:
1) it is more conductive, so it can handle power for more pixels.
2) it is insulated, so you don't need to worry about short circuits from bare threads touching each other.
3) solder joints are more reliable than knotted thread.
However, I would also recommend using a drop of E6000 or silicone adhesive as a strain relief to prevent wire breakage at the joints.

2. Would either of these provide enough power for 50 neopixels, the Flora board, and the Accelerometer?

The 3xAA will have enough power. The 150mAh LiPo is too small. This would be a better choice for a LiPo: https://www.adafruit.com/product/328

3. Assuming 50 neopixels just isn't doable connected to a single Flora board, I'll probably go with 5 separate installations of 10 neopixels each on the dress. Does anyone have any recommendations on making it less bulky with this route?

That sounds like a good plan. I'd go with the 26AWG for power and ground and the 30AWG for the signal wires. Assemble and test each set of 10. Once you have them working, you can add the strain-relief before sewing to the dress.


Hi, thanks for the answers! Would the insulated copper wire and the larger lipo pack be enough to power 50 neopixels from a single Flora? That sounds like an attractive option too if so.

coderunner
 
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Joined: Fri Feb 14, 2020 7:37 pm

Re: Flora Sparkle Dress with 50 lights

by adafruit_support_bill on Sat Feb 15, 2020 5:16 pm

Yes. That should give you several hours of run-time at least.

adafruit_support_bill
 
Posts: 77843
Joined: Sat Feb 07, 2009 10:11 am

Re: Flora Sparkle Dress with 50 lights

by coderunner on Sat Feb 15, 2020 5:41 pm

adafruit_support_bill wrote:Yes. That should give you several hours of run-time at least.


Great! Thank you for your help.

coderunner
 
Posts: 3
Joined: Fri Feb 14, 2020 7:37 pm

Please be positive and constructive with your questions and comments.